Despite being physically smaller than his peers, he was technically skilled and eventually earned promotion to Urawa Reds Youth (under-18).
[3] Nagakura spent three years with Urawa Reds Youth, but was not offered promotion to the first team, so he decided to go to Juntendo University.
Nagakura made his debut for Albirex Niigata on 12 August 2023, coming on as a substitute in a 2–2 league draw with Shonan Bellmare.
[15] On 4 September 2024, Nagakura scored four goals in a 5–0 J.League Cup quarter-final victory over Machida Zelvia, completing his first career hat-trick.
In January 2025, it was announced that Nagakura would be transferring to Urawa Red Diamonds, the club where he played the majority of his youth football.